rdpeng · Jun 22, 2014
Showing with 29 additions and 7 deletions.

+29 −7 cachematrix.R
diff --git a/cachematrix.R b/cachematrix.R
@@ -1,15 +1,37 @@
-## Put comments here that give an overall description of what your
-## functions do
-
-## Write a short comment describing this function
+## Module that implements calculating of matrix inverse and
+## caching of the inverse for future re-use without need to calculate it again
 
+## Creates a special "matrix" object that can cache its inverse.
 makeCacheMatrix <- function(x = matrix()) {
-
+  s <- NULL
+  set <- function(y) {
+    x <<- y
+    s <<- NULL
+  }
+  get <- function() x
+  setsolve <- function(solve) s <<- solve
+  getsolve <- function() s
+  list(set = set, get = get,
+       setsolve = setsolve,
+       getsolve = getsolve)
+
 }
 
 
-## Write a short comment describing this function
+## Computes the inverse of the special "matrix" returned by  
+## makeCacheMatrix  above. If the inverse has already been calculated 
+## (and the matrix has not changed), then  cacheSolve  should retrieve 
+## the inverse from the cache.
 
 cacheSolve <- function(x, ...) {
-        ## Return a matrix that is the inverse of 'x'
+  ## Return a matrix that is the inverse of 'x'
+  s <- x$getsolve()
+  if (!is.null(s)){
+    message("getting cached data")
+    return(s)
+  }
+  data <- x$get()
+  s <- solve(data, ...)
+  x$setsolve(s)
+  s
 }